1. Introduction
This instruction manual provides essential information for the proper installation, operation, and maintenance of your Gavigain G1/2" Copper Hall Effect Water Flow Sensor Switch. Please read this manual thoroughly before using the product to ensure safe and efficient performance. This sensor is designed for measuring the flow rate of liquids within a range of 1 to 30 liters per minute.
2. Safety Information
- Ensure all power is disconnected before installation or maintenance to prevent electrical shock.
- Do not exceed the specified voltage and current ratings to avoid damage to the sensor.
- Verify that all connections are secure and leak-free before operating the system.
- This sensor is designed for water and non-corrosive liquids. Do not use with flammable or corrosive substances.
- Protect the sensor from freezing temperatures, which can cause damage.
3. Product Overview
The Gavigain G1/2" Copper Hall Effect Water Flow Sensor is a robust device used to detect and measure liquid flow. It features G1/2" male threaded connections for easy integration into plumbing systems. The sensor operates on the Hall effect principle, where an internal impeller rotates with the flow of liquid, generating a series of electrical pulses. The frequency of these pulses is directly proportional to the flow rate.
Image 3.1: General view of the Gavigain G1/2" Copper Hall Effect Water Flow Sensor with its three-wire connection.
Image 3.2: Detailed view highlighting the internal turbine mechanism and the electrical connector for signal output.
Image 3.3: Close-up of the internal turbine, which rotates with water flow to generate pulse signals.
4. Specifications
Refer to the table below for detailed technical specifications of the water flow sensor.
Image 4.1: Dimensional drawing of the water flow sensor, indicating key measurements.
| Specification | Value |
|---|---|
| Model Number | Gavigaing79wpv0cnd |
| Material | Copper |
| Thread Size | G1/2" Male Thread |
| Flow Rate Range | 1-30 L/min |
| Operating Voltage | Typically 5-24V DC (based on standard Hall effect sensors) |
| Output Signal | Pulse Signal (Square Wave) |
| Product Dimensions | Approximately 2.36 x 1.02 x 1.02 inches (60 x 26 x 26 mm) |
| Item Weight | 3.52 ounces |
| Color | Silver (Brass finish) |
5. Setup and Installation
Follow these steps for proper installation of the water flow sensor:
- Prepare the System: Ensure the water supply is turned off and the system is depressurized before beginning installation.
- Identify Flow Direction: Locate the arrow marked on the sensor body. This arrow indicates the direction of liquid flow. Install the sensor so that the liquid flows in the direction of the arrow.
- Mechanical Connection: Connect the G1/2" male threads of the sensor into your plumbing system. Use appropriate thread sealant (e.g., PTFE tape) to ensure a watertight seal. Hand-tighten first, then use a wrench for a snug fit, but do not overtighten to avoid damaging the threads or sensor body.
- Electrical Wiring: The sensor typically has three wires:
- Red Wire: Connect to positive (+) power supply (e.g., +5V to +24V DC).
- Black Wire: Connect to negative (-) or ground.
- Yellow Wire: Pulse signal output. Connect this to your microcontroller or display unit's input pin.
- Test for Leaks: Slowly turn on the water supply and carefully check all connections for any leaks. Tighten connections as necessary.
- Verify Signal: Power on your control system and verify that the sensor is outputting a pulse signal when water flows through it.
6. Operating Instructions
Once installed, the water flow sensor operates by converting the mechanical rotation of an internal impeller into electrical pulses. The frequency of these pulses is directly proportional to the volume of liquid passing through the sensor.
- Flow Measurement: Your control system (e.g., microcontroller, PLC) will count the pulses generated by the sensor over a specific time period.
- Calibration: Each sensor may have a slightly different pulse-to-liter ratio (K-factor). It is recommended to calibrate your system by flowing a known volume of water through the sensor and adjusting your software's calculation accordingly. A common K-factor for G1/2" sensors is approximately 450 pulses per liter, but this can vary.
- Applications: This sensor is suitable for various applications including water heaters, vending machines, water dispensers, flow control systems, and industrial equipment requiring liquid flow monitoring.
7. Maintenance
The Gavigain water flow sensor is designed for durability, but proper maintenance can extend its lifespan and ensure accurate readings.
- Regular Inspection: Periodically inspect the sensor and connections for any signs of wear, corrosion, or leaks.
- Prevent Freezing: In environments where temperatures may drop below freezing, ensure the sensor and connected pipes are drained or adequately insulated to prevent ice formation, which can cause severe damage.
- Cleaning: If the sensor's performance degrades, it may be due to debris accumulation inside the impeller chamber. Disconnect power and water supply, carefully remove the sensor, and flush it with clean water. Avoid using harsh chemicals or abrasive tools that could damage the internal components.
- Electrical Connections: Ensure electrical connections remain clean, dry, and secure.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No pulse signal output | Incorrect wiring No power supply Impeller blocked Sensor faulty | Check red/black wire connections Verify power supply voltage Inspect for debris, clean sensor Replace sensor if necessary |
| Inaccurate flow readings | Incorrect K-factor in software Air bubbles in line Partial blockage Sensor installed incorrectly (against flow) | Recalibrate K-factor Bleed air from the system Clean sensor Reinstall sensor in correct flow direction |
| Water leakage at connections | Loose connections Insufficient thread sealant Damaged threads | Tighten connections Reapply thread sealant Inspect threads for damage, replace if necessary |
9. Warranty and Support
Gavigain products are manufactured to high-quality standards. For warranty information or technical support, please refer to the product packaging or contact your retailer. Keep your purchase receipt as proof of purchase.